| 摘要 |
Disclosed is a real-time spectrum analyzer for monitoring acoustic energy, in particular a singer's formant, comprising a microphone element for converting the energy of a singer's voice to an electrical signal, band-pass filters for filtering the signal and selectively passing a portion thereof in a dedicated frequency range of from about 2500 to about 3500 Hz corresponding to singer's formant to a display meter responsive to the portion for visually displaying the magnitude of the total energy of said portion, the band-pass filters being connected in series and tuned to different center frequencies but overlapping from about 20% to about 60% of the total pass-band.
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